When using IP cameras – as most CCTV systems do these days – you will most likely be looking at Cat6 cables, which can transfer the large amount of data required by digital video and high resolutions at very fast speeds, and often over long distances. This is an upgrade from the coax cabling that usually powers analog security cameras; coax cables are reliable, but not compatible with IP camera installation. In many cases, Cat6 cables will also power the security cameras, eliminating the need for further wiring. This is called Power-Over-Ethernet and requires a PoE switch when the security cameras are not connected to an NVR. The Network Video Recorder, also known as the NVR, is another essential element to any IP camera system. Connected to the same IP network, the NVR can be installed virtually anywhere in your building or home. The NVR allows you to record and store video on a hard drive, snap images and transmit them to your computer or remote device for live and recorded viewing. NVR’s differ mainly from DVR’s in that they record video from IP cameras, while DVR’s mainly record analog-based video to a digital format. Standard DVR recorders use coaxial cables, while many NVRs connect through Ethernet cables, such as a cat5e or cat6.